check out
https://www.tirerack.com/tires/michelin-tires.jsp.
The LTX AT 2 is a all terrain (AT) type tread and may be a bit noisy compared to a all season type tread. It has a good performance rating.
The LTX M/S is a all season (AS) and shows to have a very good performance rating. The tread should be a bit quieter.
The LTX AS is a all season tire. Tirerack shows to have a very poor performance rating from customers.
Check the reviews and pay attention to vehicles the same size of yours....and also from the same region you live and drive in. Use Michelins 1-800 number for their input.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides